1. Chemical Names and Formulas
Overview
•Metals and Non-Metals
•Ions and Ionic Charges
•Types of Compounds
•Systematic Names
-Writing Names and Formulas

2. Metals and Nonmetals Stairway Of Division on Periodic Table
C, P, Se, I, Rn and to the right are non- metals
B, Si, As, Ge, Sb, Te, Po, At are semi- metals
All others are metals

3. Ions Cations Positively Charged Atoms i.e. Na+
Anions Negatively Charged Atoms
i.e. Cl-

4. IONIC CHARGES Group I -> Group II -> Group III ->
Group IV -> 1+ 2+ 3+ 4+

5. IONIC CHARGES Group V -> Group VI -> Group VII ->
Group VIII -> 3- 2- 1-
Noble Gases

6. TYPES OF COMPOUNDS Ionic Compounds negative ions. to one another.
• composed of positive and
negative ions.
• usually formed from a metal and non-metal.
• these elements are not attached
to one another.

7. TYPES OF COMPOUNDS
Ionic Compounds con’t
• Examples
NaCl
CaBr2 KI

8. CHEMICAL FORMULAS Definition i. e. NaCl
• shows the kind and numbers of atoms in the smallest representative unit of the substance.
i. e.
NaCl

9. IONIC COMPOUNDS
A formula unit is the lowest whole number ratio of ions in an ionic compound.
i.e. Na2Cl2 -> NaCl
There is no such thing as a molecule of NaCl!!!!!!!!!

10. IONIC COMPOUNDS If charges cancel, just write the symbols
Na Cl NaCl
If charges do not cancel, criss-cross:
Ca Cl CaCl2
***Do not move the charge, only the number
***Do not write the 1

11. NAMING COMPOUNDS
Your ability to name compounds and write formula’s hinges on your ability to recognize whether a compound is Ionic or Molecular.

12. BINARY IONIC COMPOUNDS
Binary means 2 elements
Ionic means a metal and a non-metal (or cation and anion)
Writing Formulas
• charges must balance so
compound charge is neutral.

13. BINARY IONIC COMPOUNDS
Writing Formulas from Names
• 1st word = CATION
• 2nd word = ANION name
with ide ending.

14. BINARY IONIC COMPOUNDS
NaBr
MgF2
Sodium Bromide
Magnesium Fluoride

15. BINARY IONIC COMPOUNDS
Potassium Chloride
Aluminum Oxide
• notice ending of name is ide!
K+Cl- -> KCl
Al23+O32- -> Al2O3

16. Polyatomic Ions
Definition •tightly bound groups of atoms that behave as a unit and carry a charge.
Example SO32-, NO2-, ClO2-

17. TERNARY IONIC COMPOUNDS
Ternary means 3 different elements
Usually contain Poly-atomic Ions
Ionic means cation and anion

18. TERNARY IONIC COMPOUNDS:Writing Formulas
Ca2+CO32-
CaCO3
Charges canceled.
Just write the symbols
Calcium Carbonate

19. TERNARY IONIC COMPOUNDS: Naming
Calcium Nitrate
Notice the charges didn’t cancel so they criss crossed
Ca+2 (NO3)-1
Ca(NO3)2

20. Naming with Transition Metals
First word = CATION
Second word = ANION
The Roman numeral will tell you the charge of the transition metal
Silver (Ag) is an exception. It’s charge is +1

21. Naming Transition Metals
Copper (I) Oxide
Cu+1 O-2
Cu2O

22. Writing Formulas with Transition Metals
FeCl3
Fe+3 Cl-1
FeCl2
Fe+2 Cl-1
Iron (III) Chloride
Iron (II) Chloride
*Backwards criss-cross to know the charge/Roman numeral

23. TYPES OF COMPOUNDS Molecular Compounds
• composed of molecules in which elements share electrons.
• usually composed of nonmetals.
• these elements are attached

24. MOLECULAR FORMULA Definition kinds of atoms present in a
• shows the numbers and
kinds of atoms present in a
molecule of a compound.
i. e. CO

25. TYPES OF COMPOUNDS
Molecular Compounds con’t
•Examples
CS2
SiO2
BF3

26. BINARY MOLECULAR COMPOUNDS
Binary means 2 elements
Molecular means 2 non-metals
NO ionic charges are present

27. Naming Binary Molecular Compounds
Prefixes are used to show how many atoms are present in each molecule.

28. Covalent Prefixes Mono (or no prefix) – 1 Di – 2 Tri – 3 Tetra – 4
Penta – 5
Hexa – 6
Hepta – 7
Octa – 8
Nona – 9
Deca – 10

29. Writing Binary Molecular Compounds
Carbon Dioxide
• Di means 2 oxygens!!
CO •no mono prefix is used on first element

30. Naming Binary Molecular Compounds
2 ways it’s done!
• (prefix + element name)
i.e. N2O
dinitrogen monoxide

31. Naming Binary Molecular Compounds
• (prefix + element root + ide)
i.e. PCl3
Phosphorous Trichloride
All binary compounds end in ide!!!